Makoto MATSUBARA Tomoko Elizabeth YANO
Katsuhiko SHIOMI
Shunsuke TAKEMURA
SadakiHORI
Takayuki
MIYOSHI
3D seismic velocity structure
Shoji SEKIGUCHI
and Moho conﬁguration

Earthʼs Interior Laboratory

Imaging subducting plate

9Vs [km/s]
3 Regular/irregular pattern ofseismicity, possible size ofearthquake associated withactive faults, and blindfaults
 Seismicity
patternmonitoring Earthquake(occurrence)mechanism
 Multidimensional integrative
earth structure models
 Seismic wave propagation(simulation) in the 3D
heterogeneous earth4(b)2000(b)

Depth [km]100

JUICE (Japan Uniﬁed hI-resolution
relocated Catalog for Earthquakes(JUICE): Relocated hypocenter catalog
by Double-Diﬀerence method using
waveform cross-correlation and Hi-net
phase arrival time data.

7(a)

200
05Vp/Vs
1.6

100

20

1.8(c)
200
140
142
144
2.0
Matsubara et al. (2016)
3D seismic velocity structure. EWcross section of NE Japan (a) Vp, (b)Vs, (c) Vp/Vs

0.2

40

0.060

−0.20

Depth [km]36°N

3040705070 60oku
Chug2070

Shikoku

60
4030 km132°E6080400Distance [km]706050Kinki

Ise34°N

40120(c)0.4Depth [km]Vp [km/s]
5100

Yano et al. (2017)

Depth [km]0BA04030.
Kii ChanDepth [km] Depth [km] Depth [km]

(a)

Kyu
shu

Highresolution
hypocenter catalog

134°E

A

ContinentalMoho?
20LFE zone

6012080

40B ayOceanic Moho (Shiomi et al., 2008)
Hypocenter (M≥2.0)
Low Frequency Earthquake(JMA Unified Catalog)

Shiomi et al. (2016)
Conﬁguration of Moho within the Philippine Sea plate beneath W Shikoku(a) Receiver Funnction (upper and lower side of red zone is low- andhigh-V zones, respectively. (b) with hypocenter (c) Image

Heterogeneousstructure

Moho depth

Seismic wave propagation
simulation
Seismicwave
propagation of oﬀSE
Mie Earthquake on
April 1st, 2016.
Signiﬁcantwave
propagation
withinthe oceanic Moho issuccessfully
simulated (along XXʼ)

VolcanoPlate boundary

Matsubara et al. (2017)
Moho conﬁguration derived
seismic velocity structure

0Distance [km]Tokai138°E

B

40Kii Pen.

136°E

Shikoku

0from3D

Takemura et al. (2016)

 Takemura, S., K. Shiomi, T. Kimura, and T. Saito (2016) Systematic difference between first-motion and waveform-inversion solutions forshallow offshore earthquakes due to a low-angle dipping slab, Earth, Planets and Space, 68, 149, doi:10.1186/s40623-016-0527-9.
 Takemura, S., T. Maeda, T. Furumura, and K. Obara (2016) Constraining the source location of the 30 May 2015 (Mw 7.9) Bonin deep-focus
earthquake using seismogram envelopes of high-frequency P waveforms: Occurrence of deep-focus earthquake at the bottom of a subducting
slab, Geophys. Res. Lett., 43 (9), 4297-4302, doi:10.1002/2016GL068437.
 Matsubara M., H. Sato, T. Ishiyama, and A. D. Van Horne (2017) Configuration of the Moho discontinuity beneath the Japanese Islands
derived from three-dimensional seismic tomography, Tectonophysics, 710-711, 97-107, doi:10.1016/j.tecto.2016.11.025.
 Shiomi, K. (2017) Dissimilar receiver functions observed at very close stations in the Kii Peninsula, central Japan: features and causes,Earth, Planets and Space, 69, 48 DOI: 10.1186/s40623-017-0631-5.
 Takemura, S., M. Kobayashi and K. Yoshimoto (2017) High-frequency seismic wave propagation within the heterogeneous crust: Effects ofseismic scattering and intrinsic attenuation on ground motion modelling, Geophys. J. Int., in press, doi:10.1093/gji/ggx269.
 Yano, T. E. and M. Matsubara (2017) Effect of newly refined hypocenter locations on the seismic activity recorded during the 2016
Kumamoto Earthquake sequence, Earth, Planets and Space, 69, 74, doi:10.1186/s40623-017-0656-9.
 Yano, T. E., T. Takeda, M. Matsubrara, and K. Shiomi (2017) Japan unified hIgh-resolution relocated catalog for earthquakes (JUICE):
Crustal seismicity beneath the Japanese Islands, Tectonophysics, 702, 19-28, doi:10.1016/j.tecto.2017.02.017.